1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728ed42725677e3058242b6d40a3484daa596f17b3a4b6c8e02118a98eb98560. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59179ec4-b411-4c0a-bc45-db0bab6f5667.json and https://artists.proofprofile.net/proofs/artist/59179ec4-b411-4c0a-bc45-db0bab6f5667.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Tonadillas: X. La Maja Dolorosa No. 1 - Arr. By Mats Bergström
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d4ff72e7e7c0affb9c6d95a7cd94f6aab962fd0095556d8b4a373778f45a57. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138194 — a six-check JSON result.
Tonadillas: XI. La Maja Dolorosa No. 2 - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b03cb988e025f2e4522d702d1c5375bcdc8a79f1053d12ca802acb84b6a3437. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138195 — a six-check JSON result.
Tonadillas: XII. La Maja Dolorosa No. 3 - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f01c51cd9be69a7baa485aef4494d47100cd946e040a49cb113ffa525e66234. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138196 — a six-check JSON result.
Tonadillas: V. El Majo Tímido - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f4978971a9f1332b7e2c10a8a397510585f60028d82c46a88e5119345ca64c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138197 — a six-check JSON result.
Tonadillas: III. El Tra-La-La y el Punteado - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c251c511593bd6a1649df89b0c8b1b51fc6a9f7a0d8d31af47415a1bebdfe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138198 — a six-check JSON result.
Tonadillas: VII. El Mirar de la Maja - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758168ed966fea428fe2b7fc7704854d413a006fab7fdae59c931abb382e65d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138199 — a six-check JSON result.
Tonadillas: IX. El Majo Discreto - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa189110b449d51dfde70e7acd2520aa70d12d10babf978a4ba95abfdcc4d3a8b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138200 — a six-check JSON result.
3 Songs Op. 8: I. Au bord de l'eau - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a85060cf68c740090921fae3265acc66b1e07dadd4285fa77c9322c21d91fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138201 — a six-check JSON result.
2 Mélodies Op. 46: II. Clair de lune - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaed332bebd99a309027d69e3f54e8408746b507a217e95a30bcc7a9e7bb55cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138202 — a six-check JSON result.
3 Songs Op. 7: I. Après un rêve - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec98499cd457822bc3ec9edc717d9c293dbf8a616de126646c313d9f63bdcba1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138203 — a six-check JSON result.
2 Songs Op. 1: I. Le papillon et la fleur - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd5e6f418abbba291e4afea8e6e35983834c5e45f3473e53b34b3359f0a941. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138204 — a six-check JSON result.
4 Songs Op. 39: IV. Les roses d'Ispahan - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd42ec25519df073c9c3a79d3778a6a94f607e3fe6669b1c7a132af0215d237. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138205 — a six-check JSON result.
Melodi - Arr. By Robert Malmberg and Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5078c7979d759d441bc2c49cc0e42279b1c179fb1c885f0c6817cd359bab4d4a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138206 — a six-check JSON result.
Dagen svalnar - Arr. By Robert Malmberg and Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36a6c56dcabf0c8ef22914b617ea4e1ef995b888d7b27523f3378d2b6fed537. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138207 — a six-check JSON result.
Nordisk vår - Arr. By Robert Malmberg and Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8208d42faf02fd5571ecfc1f69e26064480b33ed06cb010ad00ea51a75c58029. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138208 — a six-check JSON result.
Ingen är ensam - Arr By Robert Malmberg and Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a633ea510aafa6488f2e3fbe7a3a8449c971570ebf118396301b6cd4710552. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138209 — a six-check JSON result.
El sombrero de tres picos Parte II: Danza del molinero - Arr. By Mats Bergström
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3737ee8523077fa3d2daab0faa9f15d4d99fe414e799157125bfe24ab48ba0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138210 — a six-check JSON result.
7 Canciones populares Españolas: I. El paño moruno - Arr. By Miguel Llobet and Emilio Pujol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeea04154f8289b9e8f004ca2fe1e3c419c82300fb2101e6dc7ddbb3b3bda5a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138211 — a six-check JSON result.
7 Canciones populares Españolas: II. Seguidilla murciana - Arr. By Miguel Llobet and Emilio Pujol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4347e618e50819feb46e472517d49e43ed33489cd47749ca8e0ed3d7a1604e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138212 — a six-check JSON result.
7 Canciones populares Españolas: III. Asturiana - Arr. By Miguel Llobet and Emilio Pujol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bab374d986a7b7d5349bd956001780140bad61a1e0ca9de2d662cbc4c30bff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138213 — a six-check JSON result.
7 Canciones populares Españolas: IV. Jota - Arr. By Miguel Llobet and Emilio Pujol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1ed83c7f87e0f7cd7f0a04759a8a80a588b694d0c5ccf005098b7c7960ef9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138214 — a six-check JSON result.
7 Canciones populares Españolas: V. Nana - Arr. By Miguel Llobet and Emilio Pujol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb89307ec8c7b2de77bb1c84d6d3c255f1661718cf2fb1009f4440e4dc8587d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138215 — a six-check JSON result.
7 Canciones populares Españolas: VI. Canción - Arr. By Miguel Llobet and Emilio Pujol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda67fc319b64e9c6b0aa37d92c1f81ddf7e54632616929c0cef25c3f36910c39. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138216 — a six-check JSON result.
7 Canciones populares Españolas: VII. Polo - Arr. By Miguel Llobet and Emilio Pujol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7edd3d9795a027074cce159c809b566ce8859124944f4149e6d57c512e3e8b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138217 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2ce1f6b5e9c879bc242b80df10eadc01366209f9877a24eaa0b1611cd4a951. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62138218 — a six-check JSON result.
Fahlström: Lesser Than Macbeth & Greater